Centrifugal separator.



No. 687,29I. Patented Nov. 26, l9'0l.v

G ALLSEBROOK.

GENTRIHIGAL SEPABATOR.

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No. 687,29l. Patented Nov. 26, 90L

. 'G. ALLSEBRDOK.

CENTRIFUGAL SEPARATOB.

(Application filed Mar. 2, 1901.)

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No. 687,29l. Patented No G. ALLSEBROOK. CENTRIFUGAL SEPABATOR.

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' No. 687,29l. Patented Nov. 26,190l.

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CENTRIFUGAL SEPABATOR.

(Application filed Mar. 2, 1901-) a (No ModeL) 5 Sheets-sheet 5.

UNITED STATES PATENT OFFICE.

GUTHRIE ALLSEBROOK, OF LONDON, ENGLAND.

CENTRIFUGAL SEPARATOR.

$PECIFIGATION forming part of Letters Patent No. 687,291, dated November26, 1901.

Application filed March 2, 1901.

To aZZ whom it may concern.-

Be it known that I, GUTHRIE ALLSEBROOK, engineer, a subject of the Kingof Great Britain, residing at 2 Harcourt Buildings, The Temple, London,England, haveinvented certain new and useful Improvements in CentrifugalSeparators, of which the following is a specification.

The improvements relate more especially to centrifugal separators knownas creamseparators.

According to this invention the revolving drum of the separator is madepyramidal and of hexagonal or other polygonal or corrugated form incross-section and is formed of two members, which I call shells, onewithin the other and with a small space between. The upper part of theinterior of the inner shell is made to serve as a receptacle into whichthe milk to be operated on can be poured continuously. Passages areformed at each angle for allowing milk to pass from the lower part ofthis receptacle to the space between the shells. The cream passes awayfrom the upper part of the space between the shells. At the bottom thespace between the shells opens into an outwardly-extending annular spacein which all heavyimpurities in the milk will be retained. From eachangle at the base of the outer shell a pipe for skimmilk to pass awayextends upward from the lower part ofthe space and at the top deliversthe skim-milk to a suitable collectingtray such as ordinarily used.

The action of the separators is as follows: The milk being delivered tothe space between the shells at each edge-that is, at those points whichare farthest from the axis at the level at which the milk-supply takesplace-descends along these edges, and as it descends the particles ofcream contained in it becoming subjected to a gradually-increasingcentrifugal action (by reason of the p'yramidal form of the drum) escapesidewise to the central portion of each face which is nearer to the axisof the drum and rise upward along these central portions of the faces.Thus the cream can ascend in continuous streams along the centralportions of the faces, while the heavier milk descends in separate pathsalong the edges. Conse- Serial No, 49,615. (No mbdel.)

quently the larger particles of cream are free to separate quickly, andnot being carried down far with the milk are never subjected to thegreater force to which the milk hecomes subjected as it approaches theextreme radius at the bottom ofthe drum, and it is only the smallerparticles of cream which require this greater centrifugal force toeffect their separation which alternately becomes subjected to it. Thecream passes away from the top, and the skim-milk rises up from thebottom through the ascending pipes at the edges and is delivered fromthem through suitable outlets at the top.

The separator can be used not only for separating cream from milk, butalso generally as a centrifugal separator for separating liquidsofdilferent specific gravity.

The drawings annexed show various views of a separator constructedaccording to-my invention.

Figure l is a side elevation of the separator with the left-hand half insection, taken through the center lines of two opposite faces. Fig. 2 isa similar elevation with the left-hand half in section, taken throughtwo opposite edges. Fig. 3 is a plan view; Fig. 4, a sec tion on theline a b, Fig. 2; Fig. 5, a section on the line 0 cl, and Fig. 6 asection on the line ef. Figs. 7, 8, and 9 show examples of various waysin which the shape of the drum in cross-section maybe varied. Fig. 10shows, on a smaller scale, how either the inner or outer shell may carrydistance-pieces. Fig. 11 shows, on a larger scale, the means for holdingthe ring I.

A is a vertical spindle carrying the inner wall B of the revolving drum,which is shown to be made hexagonal. To the base of this wall is secureda circular trough-shaped flange B, which extends upward all around it,and to the top is secured a hollow receptacle B into which the liquid tobe operated is to be poured continuously as the drum is revolved.

O is the outer hexagonal wall, between which and the inner wall is anarrow space. To its base is secured a circular flangeC', the outer edgeof whichis bent, downward and made to fit to the outer side of thetrough B and with it forms a hollow circular recepta- 010 in which allheavy impurities in the milk will be retained. To its top is secured acap C ,having a hole formed through it,up through which passes the upperend of the receptacle B which is made cylindrical.

D is a nut secured onto the exterior of this up er end and bearingagainst the top of the cap to lock the inner and outer walls together.

E is a conical casing surrounding the outer wall 0 to avoid agitation ofthe surrounding air when the drum is revolved.

13 represents openings at each angle of the lower part of the receptacleB by which liquid can pass from the receptacle into the interior of thedrum at each edge.

F represents tubes extending upwardly along each edge from the base tothe top of the drum. The skim-milk rises up these tubes and passes outfrom them through the short branch tubes F. A little below these branchtubes the cap 0 1s formed with an inwardly-projecting ring C which iscircular on the interior. Into this is screwed a ring H.

I is a thin metal ring held between the ring II and a shoulder on thering C The cream as it passes up has to pass between the inner edge ofthe ring I and the exterior of the receptacle 13*, which at this pointis nearly eylindrical, as shown at Fig. 6, and it then escapes by theoutlets J. The passage between the ring I and the receptacle B issomewhat nearer to the axis than the outlet-tubes F, by which theskim-milk is allowed to escape, so that a larger proportion of the milktreated passes away as skim-milk than as cream.

By using rings I of different inner diameters the proportion of cream toskim-milk delivered can be adjusted as required.

The inner faces of the outer shell or the outer faces of the inner mayhave fixed to them projections K, which act as distancepieces betweenthe shells. Such projections, as shown in Fig. 10, should incline upwardtoward but not completely extend to the central line of the face, so asnot to obstruct the passage of the cream in its inward and upward path.The distance-pieces also serve as bafiie-plates to insure that theliquid cont-ained in the space between the inner and outer shells shallbe revolved at the same speed as the drum.

It is not essential that the pyramidal cas in g should be hexagonal withflat sides, as it might be of other number of fiat sides; nor need thesides be flat planes. They might, for example, be made to curve orextend inward, as illustrated in Figs. 7, 8, and 9. With all such formsthe separation of the lighter from the heavier portion of any liquidwould be effected in precisely the same way as above described.

I have called the shells pyramidal, as they are of general pyramidalshape. The

drawings, strictly speaking, show truncated pyramids.

I claim as my invention- 1. A centrifugal separator, consisting of apair of similarly-situated pyramidal shells joined together at theirbase, means for rotating them together around their common axis, meansfor supplying milk to the space between the shells, and means fordischarging the separated cream and skim-milk.

2. A centrifugal separator, consisting of a pair of similarly-situatedpyramidal shells joined together at their base, means for rotating themtogether around their common axis, a milk-receptacle inside the innershell communicating with the space between the shells at the edgesthereof, and means for discharging the separated cream and skim-milk.

3. A centrifugal separator, consisting of a pair of similarly-situatedpyramidal shells joined together at their base, means for rotating themtogether around their common axis, means for supplying milk to the spacebetween the shells, skim-milk pipes passing up the edges of the outershell, and creamdischarge pipes at the upper part of the outer shell.

4. A centrifugal separator, consisting of a pair of similarly situatedpyramidal shells joined together at their base, means for to tating themtogether around their common axis, a milk-receptacle inside the innershell communicating with the space between the shells at the edgesthereof, skinrmilk pipes passing up the edges of the outer shell, andcream-discharge pipes at the upper part of the outer shell.

5. A centrifugal separator, consisting of a pair of similarly-situatedpyramidal shells joined together at their base, distance-pieces betweenthem, means for rotating them together around their common axis, meansfor supplying milk to the space between the shells, and means fordischarging the separated cream and skim-milk.

6. A centrifugal separator, consisting of a pair of similarly-situatedpyramidal shells joined together at their base, distance-pieces betweenthem, means for rotating them together around their common axis, amilk-receptacle inside the inner shell communicating with the spacebetween the shells at the edges thereof, and means for discharging theseparated cream and skim-milk.

7. A centrifugal separator, consisting of a pair of similarly-situatedpyramidal shells joined together at their base, distance-pieces betweenthem, means for rotating them together around their common axis, meansfor supplying milk to the space between the shells, skim-milk pipespassing up the edges of the outer shell, and cream-discharge pipes atthe upper part of the outer shell.

8. A centrifugal separator, consisting of a pair of similarly-situatedpyramidal shells joined together at their base, distance-pieces betweenthem, means for rotating them together around their common axis, amilk-re too ceptacle inside the inner shell communicating with the spacebetween the shells at the edges thereof, skim-milk pipes passing up theedges of the outer shell, and cream-discharge pipes at the upper part ofthe outer shell.

9. A centrifugal separator, consisting of a pair of similarly-situatedpyramidal shells, a closed. trough outside and below their base, meansfor rotating them together around their common axis, means for supplyingmilk to the space between the shells, and means for discharging theseparated cream and skimmilk.

10. A centrifugal separator, consisting of a pair of similarly-situatedpyramidal shells, a closed trough outside and below their base, meansfor rotating them togetheraronnd their common axis, a milk-receptacleinside the inner shell communicating with the space between the shellsat the edges thereof, and means for discharging the separated cream andskim-milk.

11. A centrifugal separator, consisting of a pair of similarly-situatedpyramidal shells, a closed trough outside and below their base, meansfor rotating them togetheraround their common axis, means for supplyingmilk to the space between the shells, skim-milk pipes passing up theedges of. the outer shell, and cream-discharge pipes at the upper partof the outer shell.

12. A centrifugal separator, consisting of a pair of similarly-situatedpyramidal shells, a closed trough outside and below their base, meansfor rotating them together around their common axis, a milk-receptacleinside the inner shell communicating with the space between the shellsat the edges thereof, skimmilk pipes passing up the edges of the outershell, and cream-discharge pipes at' the upper part of the outer shell.

13. A centrifugal separator, consisting of a pair of similarly-situatedpyramidal shells, distance-pieces between them, a closed trough outsideand below their base, means for retating them together around theircommon axis, means for supplying mill: to the space between the shells,and means for discharging the separated cream and skim-milk.

14. A centrifugal separator, consisting of a pair of similarly-situatedpyramidal shells, joined together at their base, means for rotating themtogether around their common axis, means for supplying milk to the spacebetween the shells, means for discharging the separated cream andskim-milk, and a conical casing inclosing the shells.

15. A centrifugal separator, consisting of a pair of similarly-situatedpyramidal shells, a closed trough outside and below their base, meansfor rotating them together around their common axis, means for supplyingmilk to the space between the shells, means for discharging theseparated cream and skim-milk and a conical casing inclosing the shells,

16. A centrifugal separator, consisting of a pair of similarly-situatedpyramidal shells, means for rotating them together around their commonaxis, means for supplying milk to the space between the shells, meansfor discharging the separated cream and skim-milk, with the flange, B,at the base of the inner shell, the flange, O, at the base of the outershell and fitting into the flange, B, and the nut, D, locking the shellstogether.

17. A centrifugal separator, consisting of a pair of similarly-situatedpyramidal shells joined together at their base, means for rotating themtogether around their common axis, means for supplying milk to the spacebetween the shells, means for discharging the separated cream andskim-milk, and the ring, I, adapted to vary the cream-discharge.

GUTHRIE ALLSEBROOK.

Witnesses:

ROBERT B. RANsFoRD, JOHN H. WHITEHEAI).

